thread epoch timestamp through vmopts

chain/consensus/filcns/compute_state.go

@@ -93,6 +93,7 @@ func (t *TipSetExecutor) ApplyBlocks(ctx context.Context,
 		vmopt := &vm.VMOpts{
 			StateBase:      base,
 			Epoch:          e,
+			Timestamp:      ts.MinTimestamp(),
 			Rand:           r,
 			Bstore:         sm.ChainStore().StateBlockstore(),
 			Actors:         NewActorRegistry(),

chain/stmgr/call.go

@@ -81,6 +81,7 @@ func (sm *StateManager) Call(ctx context.Context, msg *types.Message, ts *types.
 	vmopt := &vm.VMOpts{
 		StateBase:      bstate,
 		Epoch:          vmHeight,
+		Timestamp:      ts.MinTimestamp(),
 		Rand:           rand.NewStateRand(sm.cs, ts.Cids(), sm.beacon, sm.GetNetworkVersion),
 		Bstore:         sm.cs.StateBlockstore(),
 		Actors:         sm.tsExec.NewActorRegistry(),
@@ -218,6 +219,7 @@ func (sm *StateManager) CallWithGas(ctx context.Context, msg *types.Message, pri
 	vmopt := &vm.VMOpts{
 		StateBase:      stateCid,
 		Epoch:          vmHeight,
+		Timestamp:      ts.MinTimestamp(),
 		Rand:           r,
 		Bstore:         buffStore,
 		Actors:         sm.tsExec.NewActorRegistry(),

chain/stmgr/utils.go

@@ -87,6 +87,7 @@ func ComputeState(ctx context.Context, sm *StateManager, height abi.ChainEpoch,
 	vmopt := &vm.VMOpts{
 		StateBase:      base,
 		Epoch:          height,
+		Timestamp:      ts.MinTimestamp(),
 		Rand:           r,
 		Bstore:         sm.cs.StateBlockstore(),
 		Actors:         sm.tsExec.NewActorRegistry(),

chain/vm/fvm.go

@@ -298,6 +298,7 @@ func defaultFVMOpts(ctx context.Context, opts *VMOpts) (*ffi.FVMOpts, error) {
 			epoch:      opts.Epoch,
 		},
 		Epoch:          opts.Epoch,
+		Timestamp:      opts.Timestamp,
 		BaseFee:        opts.BaseFee,
 		BaseCircSupply: circToReport,
 		NetworkVersion: opts.NetworkVersion,

chain/vm/vm.go

@@ -215,6 +215,7 @@ type LegacyVM struct {
 type VMOpts struct {
 	StateBase      cid.Cid
 	Epoch          abi.ChainEpoch
+	Timestamp      uint64
 	Rand           Rand
 	Bstore         blockstore.Blockstore
 	Actors         *ActorRegistry